[2 Outlets +Adjustable] This aquarium air pump has 2 outlets, enough air volume to meet your needs, then the gas amount is adjustable, you can adjust the output according to the size of your fish tank, fit for fish tanks from 10 to 100 gallon. [Ultra Quiet] Unique rubber soft foot pads design of this fish tank air pump, can effectively absorb the sound generated when the pump is vibrating. In addition it made of ABS thickening engineering plastics, super silent , further palliation for noise. [Long Service Life] Manually adjust the air volume, won’t cause shakes and electric field fluctuation, much safer than electronic adjustment, lower failure rate. [Replaceable Air Filter Cotton] The air pump ‘s air filter cotton is replaceable, much convenient, also come with another replacement, It can deliver cleaner oxygen to your aquarium for a long time, while also ensuring a more stable gas output. [Complete Accessories] Comes with everything you need, includes: 2 x Airline (3.2ft),2 x Return Valve, 2 x Air Stone (0.98in), Connector, Air filter cotton. 24-Hour Professional After-sales Service.